Designation C1535 − 05 (Reapproved 2017) Standard Practice for Application of Exterior Insulation and Finish Systems Class PI1 This standard is issued under the fixed designation C1535; the number imm[.]
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee Designation: C1535 − 05 (Reapproved 2017) Standard Practice for Application of Exterior Insulation and Finish Systems Class PI1 This standard is issued under the fixed designation C1535; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval Scope* Referenced Documents 2.1 ASTM Standards:2 C11 Terminology Relating to Gypsum and Related Building Materials and Systems C79/C79M Specification for Gypsum Sheathing Board (Withdrawn 2004)3 C150 Specification for Portland Cement C1063 Specification for Installation of Lathing and Furring to Receive Interior and Exterior Portland Cement-Based Plaster C1177/C1177M Specification for Glass Mat Gypsum Substrate for Use as Sheathing C1186 Specification for Flat Fiber-Cement Sheets C1278/C1278M Specification for Fiber-Reinforced Gypsum Panel C1280 Specification for Application of Exterior Gypsum Panel Products for Use as Sheathing C1289 Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board C1325 Specification for Non-Asbestos Fiber-Mat Reinforced Cementitious Backer Units C1382 Test Method for Determining Tensile Adhesion Properties of Sealants When Used in Exterior Insulation and Finish Systems (EIFS) Joints C1472 Guide for Calculating Movement and Other Effects When Establishing Sealant Joint Width C1481 Guide for Use of Joint Sealants with Exterior Insulation and Finish Systems (EIFS) E1825 Guide for Evaluation of Exterior Building Wall Materials, Products, and Systems E2110 Terminology for Exterior Insulation and Finish Systems (EIFS) 1.1 This practice covers the minimum requirements and procedures for field or prefabricated application of Class PI Exterior Insulation and Finish Systems (EIFS) Class PI EIFS are systems applied over polyisocyanurate insulation board, in which the base coat ranges from not less than 1⁄16 in (1.6 mm) to 1⁄4 in (6.4 mm) in dry thickness, depending upon the number of nonmetallic reinforcing mesh layers encapsulated in the base coat The base coat is then covered with a finish coat of various thickness in a variety of textures and colors The insulation board shall be applied over a substrate or over open framing 1.2 This practice does not cover Class PI EIFS with drainage Consult the EIFS producer for information 1.3 The values stated in inch-pound units are to be regarded as the standard The SI (metric) values given in parentheses are approximate and are provided for information purposes only 1.4 The text of this standard references notes and footnotes that provide explanatory material These notes and footnotes shall not be considered as requirements of the standard 1.5 This standard may involve hazardous materials, operations and equipment This standard does not purport to address all of the safety concerns, if any, associated with its use It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee Terminology 3.1 Definitions used in this standard shall be in accordance with Terminologies C11 and E2110 This practice is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of Subcommittee C11.05 on Application of Exterior Insulating and Finish Systems and Related Products Current edition approved April 1, 2017 Published April 2017 Originally approved in 2002 Last previous edition approved in 2005 as C1535 – 05 (2011) DOI: 10.1520/C1535-05R17 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website The last approved version of this historical standard is referenced on www.astm.org *A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States C1535 − 05 (2017) 9.4 Insulation board shall be stacked flat with care taken to avoid damage to edges, ends, or surfaces; or exposure to direct sunlight (ultraviolet radiation) Significance and Use 4.1 This practice provides minimum requirements for the application of Class PI EIFS The requirements for materials, mixtures, and details shall be contained in the project plans and specifications See Guide E1825 for guidance 10 Environmental Conditions 10.1 Cold Weather Conditions: 10.1.1 Wet materials shall not be applied when the temperature is less than 40°F (4°C) unless otherwise specified by the manufacturer or unless temporary heat and enclosures are provided to maintain minimum 40°F (4°C) for a minimum period of not less than 24 hours before, during and after application (See X1.8.3) 10.1.2 Materials shall not be applied to a base containing frost Substrate surface temperature shall be not less than 40°F (4°C) Mixtures for application shall not contain any frozen ingredients Delivery of Materials 5.1 All materials shall be delivered in packages, containers, or bundles with the identification and markings intact Inspection 6.1 Inspection of the materials shall be agreed upon and be a part of the purchase agreement 6.2 Inspection shall include the determination that the materials supplied are as required for the Class PI EIF System specified Mixing of materials from different manufacturers is not allowed 11 Assessment of Condition of Substrates to Receive Exterior Insulation and Finish Systems Rejection 11.1 The substrate shall be as required by the project plans and specifications and as recommended by the EIFS producer for the particular system specified 11.1.1 Polyisocyanurate boards for use over open framing in conformance with the EIFS producer’s specification shall not be less than 1.0 in (25.4 mm) in thickness 11.1.2 Polyisocyanurate boards for use over a substrate in conformance with the EIFS producer’s specification shall not be less than 5⁄8 in (15.9 mm) in thickness 7.1 Materials that are damaged, frozen or defective shall not be used Rejection of materials shall be promptly reported verbally to the producer and immediately reported in writing The notice of rejection shall contain a statement documenting the basis for material rejection Certification 8.1 When specified in the contract documents, the producer shall furnish a report certifying that the materials are in conformance with product and material standards and contract documents NOTE 1—Polyisocyanurate board thickness shall conform to building code requirements 11.2 The substrate shall be inspected by the applicator and general contractor to assure that it meets the project plans and specifications and the requirements of 11.3 – 11.8 8.2 Insulation Boards: 8.2.1 Insulation boards shall be in compliance with Specification C1289 , Type II, Class 8.2.2 Insulation boards shall have been subjected to a third party quality control inspection and shall be marked as approved for use within the EIFS and in accordance with applicable building code 8.2.3 Prior to installation, the insulation board shall be inspected for conformance with contract documents Nonconforming insulation board shall not be used 8.2.4 The insulation board producer shall furnish, for each shipment, a written certificate of conformance with the EIFS producer’s specifications 11.3 Sheathing materials shall be inspected to ensure the following: 11.3.1 The specified sheathing thickness has been installed for the stud spacing used 11.3.2 Fastener type and fastener spacing are as specified 11.3.3 All Specification C79/C79M gypsum sheathing boards have a water-resistant treated core 11.3.4 Tongue and groove water-resistant core gypsum sheathing boards conforming to Specification C79/C79M are installed with the tongue edge oriented to the top 11.3.5 Gypsum sheathing shall be installed with the face paper exposed in accordance with Specification C1280 11.3.6 Gypsum sheathing shall be protected from moisture at all penetrations and terminations 11.3.7 Glass mat gypsum sheathing complying with Specification C1177/C1177M shall be installed in accordance with the sheathing producer’s written installation instructions, which include details of framing type and spacing, fastener type and spacing, and sheathing orientation and spacing 11.3.8 Plywood shall be not less than 1⁄2 in (12.7 mm) nominal in thickness, exterior or exposure panel sheathing The plywood shall be installed with a 1⁄8 in (3.2 mm) space between sheets at edges and ends 11.3.9 Fiber-Cement sheets complying with Specification C1186, Type A, shall be installed in accordance with the sheet Storage of Materials 9.1 All materials shall be kept dry by storage under cover and protected from the weather When outside storage is required, materials shall be stacked off the ground, supported on a level platform and protected from the weather, surface contamination or physical damage in accordance with the EIFS producer’s written instructions 9.2 Materials shall be protected from exposure to direct sunlight and temperatures less than 40°F (4°C) unless otherwise specified by the manufacturer 9.3 Portland Cement shall meet Specification C150 and shall be kept dry until ready for use It shall be kept off the ground, under cover and away from damp walls and surfaces C1535 − 05 (2017) producer’s written installation instructions, which include details of stud type and spacing, fastener type and spacing, and sheet spacing recommendations 11.3.10 Water-resistant exterior fiber-reinforced gypsum sheathing complying with Specification C1278/C1278M shall be installed in accordance with the sheathing producer’s written installation instructions, which include details of framing type and spacing, fastener type and spacing, and sheathing orientation and spacing 11.3.11 Fiber-mat reinforced cement sheets complying with Specification C1325, type A, shall be installed in accordance with the sheet producer’s written installation instructions, which include details of framing type and spacing, fastener type and spacing, and sheet orientation and spacing 11.3.12 Sheathing shall be continuous 12.3 Placement of a weather resistive barrier, if specified, shall be as required by the system producer 13 General Requirements 13.1 Insulation boards shall be placed from a level base line with vertical joints staggered in a running bond pattern and butted tightly Over open framing, joints shall occur over framing or horizontal blocking 13.2 Insulation board joints at all inside and outside corners shall be staggered and interlocked 13.3 Insulation boards must abut without gaps, eliminating space for base coat intrusion between the board edges and ends 13.4 Fenestration opening corners and other wall penetrations shall be cut out of a single insulation board Board joints shall not be aligned at corners with head, sill or jambs of windows, doors, similar openings, and aesthetic reveals 11.4 Alignment—All substrate surfaces shall be straight and true within 1⁄4 in./10 ft (2 mm/m) More stringent requirements by the EIFS producer shall supersede the above stated requirements 13.5 Mechanically Fastened: 13.5.1 Insulation board joints shall be offset from sheathing board joints 13.5.2 When the boards are attached only with mechanical fasteners, they shall be affixed to a nailable substrate or structural members with the proper fasteners, ensuring that all boards abut tightly Fastening pattern shall be in accordance with the EIFS producer’s recommendation and local building code requirements When installed, the washer shall be left flush with the face of the insulation board and shall not fracture the face or core of insulation board 11.5 Suitability for Use—The substrate shall be firm, sound, and undamaged in order to receive the EIFS 11.6 Cleanliness—The surface of all substrates shall be clean and free from any foreign materials such as paint, form release agents, curing compounds, dust, dirt, frost, oil or grease, efflorescence and laitance that would affect the EIFS application 11.7 Dryness: 11.7.1 Newly constructed concrete or masonry surfaces shall be allowed to cure not less than 28 days prior to application of the EIFS Repaired areas on existing (aged) walls shall meet the same 28-day curing time 11.7.2 Substrate surfaces shall be free of visible water 14 Aesthetic Reveals 14.1 Aesthetic reveals shall be cut into the insulation board prior to applying the reinforcing mesh 11.8 Metal Lath or Furring and Accessories—If metal lath or furring and accessories are used, they shall be installed in conformance with Specification C1063, except lath edges and ends 2shall be butted and not lapped Metal lath shall be 3.4 lb/yd (1.3 kg/m2) self-furring, galvanized 11.8.1 Metal members shall be properly attached, straight, and true unless otherwise required by the system design 11.8.2 Metal members shall be free of rust, oil, or other foreign matter or contaminants, which cause bond failure or unsightly discoloration 14.2 The insulation board thickness at the bottom of a reveal shall be not less than 3⁄4 in (19.0 mm) Over open framing, aesthetic reveals shall occur over framing or blocking 14.3 Aesthetic reveals shall be cut true and straight 14.4 Horizontal aesthetic reveal configuration shall provide for outward positive drainage 14.5 Aesthetic reveals shall not occur at the abutment of two pieces of insulation board 14.6 The reveal shall be reinforced with base coat and reinforcing mesh prior to application of the full base coat and reinforcing mesh 12 Insulation Board Installation 12.1 Method of Attachment shall be approved by the system producer and be in accordance with applicable building code 15 Reinforced Base Coat Application 12.2 Mechanical Attachment Method: 12.2.1 Mechanical fasteners shall be installed into the framing or nailable substrate 12.2.2 Mechanical fasteners shall be corrosion resistant Fastener type and spacing shall be in accordance with system producer’s current published instructions 15.1 Inspect the insulation board surface to ensure that it is clean, dry, free of all foreign materials, and damage of any type Insulation board planar irregularities of more than 1⁄16 in (1.6 mm) shall be corrected All board joints shall be tightly abutted or shall be filled with an insulating material 15.2 Base Coat Preparation—All materials requiring field preparation shall be mixed in accordance with the EIFS producer’s specifications NOTE 2—Specific consideration of building code wind load requirements shall be given for mechanically fastened systems C1535 − 05 (2017) 15.12 Special Insulation Shapes—When special insulation shapes are installed over EIFS, nonmetallic reinforcing mesh encapsulated in the base coat shall be used to cover the shape 15.3 Base Coat Application—The prepared base coat shall be uniformly spread over the entire surface of the insulation board 15.4 Non Metallic Reinforcing Mesh—The single layer reinforcing mesh shall be fully encapsulated in the field of the wall, at corners, edges, and joints Trowel from the center to the edge of the reinforcing mesh to avoid wrinkles The single layer reinforcing mesh shall be continuous at all corners 15.4.1 The surface shall be free of voids, projections, trowel marks and other surface irregularities The base coat thickness shall be not less than 1⁄16 in (1.6 mm) dry as measured from the surface of the insulation board The base coat shall be applied in two applications unless otherwise recommended by the EIFS’s producer 16 Finish Coat Application 16.1 The reinforced base coat shall be allowed to dry and harden for not less than 24 h prior to finish coat application unless specifically allowed by the EIFS producer 16.2 Material Preparation—The finish coat shall be mixed in accordance with the EIFS producer’s specifications Only clean potable water shall be added to adjust workability Always add the same amount of water to each container within a given lot of finish 16.3 Execution—Finish shall be applied with a stainless steel trowel or appropriate equipment as specified by the EIFS producer Tools and equipment shall be kept clean at all times Finish shall be applied continuously to a natural break such as corners, joints or tape line Apply finish to the base coat maintaining a wet edge Sufficient manpower and scaffolding shall be provided to continuously finish a distinct wall area Scaffolding shall be spaced a distance from the wall, consistent with safety standards, that will allow uniform texturing of the finish without staging marks On hot windy days, misting is permitted with clean, potable water to cool the wall Work shall precede the sun whenever possible Water shall not be added to the finish once it is applied to the wall Use the same tool and hand motion and match the texture of the surrounding area The finish coat thickness shall be as specified by the EIFS producer Protect all finish work from damage until fully dried NOTE 3—The recommended method is to apply the base coat in two applications 15.5 Reinforcing Mesh Overlap—All reinforcing mesh edges shall be overlapped not less than 1⁄2 in (64 mm) 15.6 Impact Layers—When required, higher impact performance shall be achieved with multiple layers of reinforcing mesh or by incorporating heavier weight reinforcing mesh All areas requiring higher impact performance shall be detailed on the project plans and specifications When overlapping of high impact mesh is not required, a complete second layer of reinforcing mesh shall be applied over the layer of high impact mesh 15.7 Corners—Reinforcing mesh shall not be lapped within in (200 mm) of any corner 15.8 Wall Penetrations—All edges of the insulation board at penetrations of the EIFS, such as at windows, doors, HVAC sleeves, pipes, ducts, electrical boxes, and at the base of the wall shall be wrapped with either the base coat and reinforcing mesh or trim, or as specified by the project plans and specifications Wall openings such as doors, windows, HVAC sleeves, shall be diagonally reinforced at corners with mesh not less than in (230 mm) by 12 in (305 mm) 15.8.1 The corners of returns to windows, doors, and similar wall openings shall have reinforcing mesh the full width of the return and extending not less than 21⁄2 in (64 mm) on both sides of the corner 15.9 Expansion Joints—All edges of the insulation board at expansion joints shall be wrapped with either the base coat and reinforcing mesh or trim as specified by the EIFS producer for the particular EIFS The reinforcing mesh shall be fully encapsulated 15.10 Aesthetic Reveal—The reinforcing mesh shall be continuous and care shall be taken to ensure that the reinforcing mesh is fully encapsulated into the reveal and that the reinforcing mesh shall not be cut during application of the base coat 15.11 Reinforced Base Coat—The reinforcing mesh shall be fully encapsulated in the base coat throughout the field of the wall, at corners, edges, and joints The surface shall be free of voids, projections, trowel marks and other surface irregularities 16.4 Sealant Joints—The application of finish into the sealant joint is not allowed 17 Curing Time Between Application Steps 17.1 Manufacturer’s recommendations for climatic conditions, mixing and application practices to allow respective coats sufficient time to cure or dry before any subsequent coats are applied shall be followed Each application step shall be cured or dried to prevent degradation to the system integrity with subsequent steps 17.2 Auxiliary protection (tenting, supplemental heat, shading) from adverse environmental conditions shall be utilized to provide curing and drying conditions as recommended by the producer (see X1.8) 17.3 All substrates shall be sound and cured or dry before continuing on to the next application step 18 Clean Up 18.1 Adjacent materials, surfaces and the work area shall be cleaned of foreign materials resulting from the work 18.2 All excess EIFS materials shall be removed from the job site 19 Keywords 19.1 Class PI; EIFS; exterior insulation and finish system C1535 − 05 (2017) APPENDIXES (Nonmandatory Information) X1 GENERAL INFORMATION INTRODUCTION These appendixes give general information and also suggestions for inclusions to be made elsewhere by the specifier They are not part of this practice shall be clearly shown in large scale details Parapet caps shall be installed as soon as practical after the installation of the EIFS X1.2.4 Provide for sealing of expansion joints, panel joints, system terminations and all interfaces of the EIFS with other building components X1.2.5 At soffits, window and door heads provide for a drip edge X1.2.6 Windows installed in EIFS walls shall have a sill pan flashing of corrosion-resistant material X1.2.7 The specifier shall evaluate the potential of the EIFS surface being subjected to abnormal stresses or impacts X1.2.8 Wall assemblies have properties that in certain applications make a dew point analysis critical to ensure successful performance of the wall system The specifier shall evaluate these conditions X1.2.9 Sheathing must be continuous over floor slabs, intersecting walls, columns, beams and similar constructions The EIFS shall not be installed over areas without sheathing If the sheathing cannot be continuous, the installation of expansion joints shall be considered X1.2.10 Where the sheathing is interrupted or out of plane, corrections must be made prior to EIFS application X1.2.11 A weather resistive barrier and flashings may be required and specified in moisture and water sensitive construction The EIFS producer, architect, and specifier shall evaluate the conditions and determine the need X1.1 General X1.1.1 The work includes all labor, materials, services, equipment and scaffolding required to complete the EIFS installation on the project in accordance with the project drawings and specifications, except electrical power and potable water X1.1.2 Where a specific fire resistance rating is required for the EIFS assemblies and construction, details of construction shall be in accordance with official reports of tests conducted by recognized testing laboratories and a part of approved plans and specifications X1.1.3 The installation of the EIFS is to be coordinated by the owner’s authorized agent with work of other trades X1.1.4 Surfaces and accessories to receive EIFS components shall be examined and accepted as provided in 11.2 before the EIFS components are installed thereto The proper authorities shall be notified about unacceptable conditions The unsatisfactory conditions shall be corrected prior to the application of the EIFS components Unsatisfactory conditions shall be corrected by the party or parties responsible for such conditions X1.1.5 The construction specifier shall describe, in the proper section of the project specifications, the physical characteristics of the surfaces to receive the EIFS X1.2 Design Considerations X1.2.1 EIFS are attached to outside surfaces of all types of structures to provide weather resistant, energy efficient, and durable claddings The claddings will be subjected to various exposures such as abrasion, vibration, moisture, freezing, thawing, negative and positive wind loading , ultraviolet light, acid rain, thermally induced expansion and contraction, and impact X1.3 Relief From Stress X1.3.1 Where the EIFS and dissimilar types of substrates, materials and building components interface, provide for appropriate size and location of expansion joints X1.3.2 Where roof elevations change, provide for appropriate size and location of expansion joints X1.2.2 Provide sufficient slope on faces of EIFS surfaces to prevent water, snow or ice from accumulating or standing A minimum in (152 mm) in 12 in (305 mm) (1:2) pitch is recommended Length of sloped surfaces shall not be more than 12 in (305 mm) X1.4 Bonding Agents X1.4.1 Bonding compounds or agents are sometimes applied to the insulation board surface prior to base coat application Follow the EIFS producer’s instructions and specifications for their use X1.2.3 Provide parapet cap made only from corrosion resistant materials The parapet cap shall extend not less than 21⁄2 in (64 mm) over the faces of the EIFS, not including wood blocking and include a drip edge detail Detailed requirements for furnishing and installing the parapet cap shall be in the appropriate section of the project specifications Parapet caps X1.5 Mechanical Fasteners X1.5.1 The types of mechanical fasteners used and the methods of installation will vary depending upon the substrate to which the insulation boards are to be fastened C1535 − 05 (2017) X1.7.3 To provide some guidance, the following categories are generally understood and recognized to imply a particular method of application or finished appearance X1.7.3.1 Sand Finish—A finish material devoid of coarse aggregate applied in a thin coat completely covering the base coat and floated to a true plane, yielding a relatively finetextured finish X1.7.3.2 Trowel Texture—A freshly applied finish is given various textures, designs or stippled effects by hand motion and trowel used The effects achieved are individualized and it is sometimes difficult for different applicators to duplicate X1.7.3.3 Standard Finish—A finish with various size aggregates, applied in a thin coat completely covering the base coat and floated in a random pattern The applicators are cautioned to use the same type texturing tools to help ensure a consistent texture X1.7.3.4 Exposed Aggregate—Varying sizes of natural or manufactured stone, gravel, shell or ceramic aggregates are embedded by hand or by machine propulsion into a freshly applied “bed coat.” The size of the aggregate shall not be more than 1⁄2 in (12.7 mm) diameter The size of the aggregate determines the thickness of the bedding coat The bedding coat shall be no less than one-half the thickness of the aggregate to be embedded X1.7.3.5 Spray Texture—A machine applied finish material The texture achieved depends on many factors some of which are the consistency of the sprayed mixture, the angle and distance of the spray nozzle to the surface, the pressure of the machine, orifice size used, operator expertise, climatic conditions (wind specifically), and base coat conditions X1.7.3.6 Miscellaneous Types—Similar to trowel textures except that the freshly applied finish is textured with instruments other than a trowel, such as swept with a broom or brush, or corrugated by raking or combing A variation of texturing a finish involves waiting until the applied finish has partially dried and then lightly troweling the unevenly applied finish The effects achieved are sometimes difficult for different applicators to duplicate X1.5.2 Fastener washers shall be installed flush with the insulation board surface X1.5.3 Fastener spacing shall be specified by the design professional consistent with wind load requirements and the local building code on the specific project X1.6 Reinforced Base Coats X1.6.1 Base coat thickness is permitted to exceed 1⁄16 in (1.6 mm) dry depending on the type of base coat used and the impact resistance specified X1.6.2 A small amount of base coat shrinkage is normal Due to color variations, a very slight telegraphing of the reinforcing mesh pattern may appear after the base coat cures Bare mesh shall not be visible and the mesh pattern shall not be tactile X1.6.3 The producer’s instructions shall be followed to ensure that the base coat and cement are properly proportioned The proper portioning of cement-based material is important Excess cement may cause the base coat to become hard and stiff as the cement hydrates over time X1.6.4 The minimum amount of mix water to form a workable mix shall be used Excess mix water causes the base coat to be porous, less weather resistant, and contribute to shrinkage Never add more water than recommended by the producer Measure water in containers of known volume X1.6.5 Mix materials only at low speed with paddles designed to reduce air entrapment X1.6.6 Generally, when applying layers of mesh, the second base coat layer is applied as soon as the first layer has dried sufficiently to receive the second base coat application Depending upon material composition and weather conditions, this sometimes occurs within the first 24 h after the completion of the application of the initial base coat, and, in some cases, it will require waiting until the following day X1.6.7 Trowel aesthetic reveals and corners with a trowel shaped to fit the profiles X1.8 Conditions for EIFS Application X1.7 Finish Textures X1.8.1 The amount of water used to mix materials is to be within the allowable range published by the EIFS producer Factors such as the drying conditions and finishing operations must be considered in determining water usage The applicator is cautioned that the use of excessive water results in fall off or slide off, excessive shrinkage, higher porosity, lower strength, and inconsistent color X1.7.1 Textures, as a description of surface appearance, generally are identified with the method and tools used to achieve the finish appearance Texture is sometimes varied by the size and shape of the aggregate contained in the finish, equipment or tools employed, the consistency of the finish mix, the condition of the base to which it is applied and by decorative and protective treatments X1.8.2 Timing between coats will vary with climatic conditions and types of materials used Temperature and relative humidity extend or reduce the curing and drying time Cold or wet weather lengthens and hot or dry weather shortens the drying period Moderate changes in temperature and relative humidity are overcome by providing additional heating during cold weather and by pre-wetting the base during hot, dry weather X1.7.2 With almost limitless variations possible for finish appearance or texture, the same term sometimes does not have the same meaning to the specifier, contractor or applicator Sample panels of sufficient size including components and features specified shall be constructed using the methods, tools and techniques to be used in the actual construction It is recommended that in the case of prefabrication, two panels be constructed One panel remains at the jobsite One panel remains at the fabrication site The samples shall be approved by the architect and owner in writing X1.8.3 Heated enclosures require adequate air circulation to prevent hot or cold spots that allow too rapid drying or freezing When using heated enclosures it is important to C1535 − 05 (2017) control the relative humidity as well as the temperature Maintain relative humidity at not more than 90 % one plane to another, dissimilar materials, or other building components, are minimized by providing sufficient depth and angle for drip caps and drip edges X1.8.4 Staining and discoloration of finishes or other building components that are caused by free water draining from X2 SEALANT SYSTEMS X2.3 The sealant system is recommended by the EIFS and sealant producer Non-recommended sealant systems must be jointly approved by the architect and the sealant producer X2.1 The size and location of joints and selection of the sealant to be used is the responsibility of the design professional and shall be consistent with project conditions and guidelines of the EIFS producer See Guide C1472 for guidance X2.4 Base the joint design and surface preparation on the sealant producer’s recommendations and project conditions See Guide C1481 for guidance X2.2 The sealant system must be tested for compatibility with the specified EIFS by an independent laboratory and found to be compatible with the EIFS See Test Method C1382 for guidance X2.5 Allow the EIFS material to cure prior to sealant system installation SUMMARY OF CHANGES Committee C11 has identified the location of selected changes to this practice since the last issue, C1535 – 04, that may impact the use of this practice (Approved October 1, 2005) (1) Added Specification C1325 to Referenced Documents (2) Added new paragraph 11.3.11 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on 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